Fiber trough base



FIG. 1 is a top perspective view of the fiber trough base.

FIG. 2 is a second top perspective view thereof.

FIG. 3 is a first bottom perspective view thereof.

FIG. 4 is a second bottom perspective view thereof.

FIG. 5 is a first side view thereof.

FIG. 6 is a second side view thereof.

FIG. 7 is a third side view thereof.

FIG. 8 is a fourth side view thereof; and,

FIG. 9 is a bottom view thereof.

The broken line showing aspects of the fiber trough horizontal T component is for the purpose of illustrating environmental structure and forms no part of the claimed design. 

The ornamental design for the fiber trough base, as shown and described. 